Does selection explain the widening mortality gap by education?
Core argument: Selection is plausibly responsible for most or even all of the widening mortality gap between American adults with and without a BA, according to this commentary on Anne Case and Angus Deaton's work.
I find it entirely plausible that selection accounts for most or even all of the widening mortality gap. Measures of achievement have not risen among 12 graders and other high school students for essentially the entire period since we started to measure them in a consistent way (i.e. since the early 1970s). However, the share who obtain a BA degree has increased quite dramatically over the same period. An NLSY [National Longitudinal Survey Youth] exercise shows that non-BAs are increasingly negatively selected. A comparison between the NLSY79 (1979) and the NLSY97 (1997) shows that the distribution of ASVAB [Armed Services Vocational Aptitude Battery] percentiles of non-BAs is shifted to the left for 97 vis-a-vis 79.





